91840608 has 48 divisors (see below), whose sum is σ = 267870960. Its totient is φ = 30613248.

The previous prime is 91840607. The next prime is 91840621. The reversal of 91840608 is 80604819.

It is a happy number.

91840608 is a `hidden beast` number, since 9 + 1 + 8 + 40 + 608 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91840603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52285 + ... + 54012.

It is an arithmetic number, because the mean of its divisors is an integer number (5580645).

Almost surely, 2^91840608 is an apocalyptic number.

It is an amenable number.

91840608 is an abundant number, since it is smaller than the sum of its proper divisors (176030352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91840608 is a wasteful number, since it uses less digits than its factorization.

91840608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106316 (or 106302 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 91840608 is about 9583.3505623034. The cubic root of 91840608 is about 451.1748854287.

The spelling of 91840608 in words is "ninety-one million, eight hundred forty thousand, six hundred eight".